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(No Model.)

P.V HOGAN. PROCESS OP AND APPARATUS POR RECOVERING ALKALI. lNo. 366,956.Patented July 19, 1887.

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'UNTTED STATES PATENT Fries.

PETER HOGAN, OF BALLSTON, NE\V YORK.

PROCESS OF`AND APPARATUS FOR RECOVERING ALKALPI.

SPECIFICATION forming part of Letters Patent No. 356,956, dated July 19,1887.

Application tiled July 15, 1886. Serial No. 208,165. (No model.)

To all whom, it may concern:

Be it known that I, PETER HOGAN, a citizen of the United States,residing at Ballston,

in the county of Saratoga and State of New York, have invented a new anduseful Process of and Apparatus for Recovering the ByPro ducts of SpentLiquor, of which the following` is a specification.

Myinvention relates to a new process of and apparatus for separating thesoda and other byproducts of the spent liquor in the manufacture of woodpulp and other materials and rendering the same capable of beingutilized; and the object of my invention is to provide a new andeconomical mode of utilizing the valuable constituents ofspentliquorfrom the manufacture of wood pulp or other source, when such liquorcontains soda and other by-produets. I attain these obj ects by themechanism and by the process illustrated in the accompanying d rawing,which shows the compartments, pipes,

l and machinery in and by which the liquor is treated in accordance withmy process as arranged in a suitable building.

The vertical cylinder M opens into the horizontal cylinder J. In thehorizontal cylinder .I is arranged a propeller, K, journaled in thecylinder-head and operated by suitable gearing. rlhe end of thehorizontal cylinder J, opposite the end where the propeller isjournaled, is closed by a valve, Z, which may be raised or lowered bymeans of the rack and pinion L and Z.

I place dry peat or other porous material into the vertical cylinder M,and then let the spent liquor run into the vertical cylinder M upon thepeat from the pipe X. The dry porous material absorbs the liquor andbecomes saturated with it. I then stop the How of the liquor and forcethe saturated peat into the end of the cylinder .I nearest the valve Z',by means of the propeller K, and then place more peat into cylinder' Mand cause it to absorb liquor from the pipe X. I then raise the valve Zand operate the propeller K, which forces the saturated peat into therevolving` cylinder l. The cylinder I is caused to revolve slowly bymeans ofa worm-geariug, g t,and rests on trunnions a a a.

The revolving cylinder I is open at each end and communicates with thefurnace B by means of the tube or pipe B. The hot air from the furnace Bis thus made to pass through the re- Volving cylinder I, where it comesin contact with the saturated peat and the mass is dried.

he peat containing byproducts ofthe liquor drops from the revolving`cylinder I into the furnace B, where combustion is maintained, and theash containing the byproducts of the spent liquor is recovered in thechamber D under the grate C.

The vapor from the drying peat in the revolving cylinder Ipasses intothe tube G, and from thence into the chimney, or it may be forced intothe condensing-flue by means of the fan-blower II. The condensing-flue Iis provided with a convoluted tube, into which the vapor is received andthrough which it passes, and around this convoluted tube, is placedwater, which cools the tube, and the various convolutions o o o allowthe vapor to come into contact with the cool surface of the tube at agreat many points, and thus condensation isreadilyobtained.Thecondensing-flueopens just beneath the grate C of the furnace into theash-chamber l), where any carbon or other ingredient remaining isburned, and the draft aids the combustion in the furnace. The watergenerated by condensation is collected at the bottom of the flue and isdrawn off by the cock t. This process, as well as the apparatus by which it is accomplished, is simple and inexpensive.

It is proposed to utilize by my process not only1 the spent liquor whichis usually wasted at factories, but also peat, which is a very porouscarbonaeeous substance, and which is found in large quantities invarious parts of our land, peat being peculiarly adapted for the purposeto which I put it in my process, because it contains so much carbon andis so porous.

The method now in use for recovering the byproducts from spent liquor isto place the liquor in evaporating-pans and put the fire under a stackcontaining several layers of pans, the fire burning around and in thepans eaus ing a most abominable stench and a great loss of fuel.

By my process the atmosphere is not con taminated, all the impuritiesbeing destroyed, and the minimum amount of fuel is required and all ofthe by-produets recovered.

Vhat I claim as my invention, and desire to secure by Letters Patent,is-

IOC

the vertical cylinder M, having a pipe, X, opening into it at or nearits upper end and opening into the cylinder J at its lower end, the pro#peller K, contained in said cylinder and the valve Z', separating thecylindenJ from the revolving cylinder I, all substantially as described,and for the purpose set forth.

8. In an apparatus for recovering the byproducts of spent liquor, thecombination of the revolving cylinderl, opening at one end' into thefurnace B and at the other end into the tube G, the fanblower H, and theconvoluted condensing-flue W, all substantially as described, and forthe purpose set forth.

PETER HOGAN.

Witnesses:

FREDERICK W. CAMERON, SEYMOUR N. HARRIs.

